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live-wrapper is a tool initially produced by the Debian Live Team that can be used to create Debian-based live images for use with CDs, DVDs or USB sticks.
A couple of days ago an interesting step-by-step guide on how to install Debian with full disk encryption, including /boot, using debian-installer was posted on the debian-boot mailinglist. This reminded me of the steps I used and wrote down a couple of month ago to create a similar setup. These steps describe a full disk (including /boot) encrypted setup on a non coreboot enabled system using the great grml live distro. (And just to be sure I just redid the same setup on a test device with the newest grml release Gnackwatschn):
Peter Alexanders 'Sehns des is Weanerisch' live in Köln 23.09.1976 Version von Carl Lorens' 'Sehns des is Weanerisch'
n a perfect world, one would upgrade databases one version at a time and not let them get too old. But our databases are where the “crown jewels” are. They must stay up 24×7. When performance is acceptable, it’s acceptable, and sometimes old versions stay around too long. We don’t live in a perfect world. This idea applies to so many things. There’s almost never a perfect data model. There is always some type of resource constraint be it storage, memory, CPU, IOPS, or just plain dollars.
I will bring this concept of not living in a perfect world into a discussion about upgrades.
Ideally there would be…
- …time to do two upgrades. One upgrade to 5.6, the other to 5.7. This is the way sane, normal people upgrade.
- …a lot of extra hardware. It sure would be nice to maybe combine a maintenance like this with a hardware refresh so that we could just have an entirely new MySQL 5.7 database shard, slap a MySQL 5.6 box in the middle as a relay, and once things are all caught up just do a VIP cutover to new machines.
The extra hardware idea I have actually worked with in the past. A client of a company I worked for just had a standalone 5.5 machine with no replicants. They were able to allocate two more servers, one to be a 5.6 relay and one new 5.7 machine that would serve as a final destination. Added bonus… At the end the 5.6 server would be upgraded and left in place for a redundant machine.
Michael J. Fox and Christopher Lloyd reprise their iconic characters from "Back To The Future" for a very special appearance on our show.
To stream video and audio from A20SOM-EVB, ffmpeg and crtmpserver are used. FFmpeg is used to encode the video and audio from A20SOM-EVB csi-camera and mic-in and then feed the stream to crtmpserver. Crtmpserver act as streaming server to provide rtmp stream for flash player, or rtsp stream for video player such as videolan.
If the csi camera is not yet functioning on the default debian distro, please follow my previous article how to enable csi-camera on A20SOM-EVB.